TY  - JOUR
AB  - Isoleucic acid (ILA) was identified in human patients with maple syrup urine disease (MSUD) half a century ago. MSUD patients, who are defective in the catabolism of branched-chain amino acids (BCAAs), that is, isoleucine, leucine, and valine, have urine with a unique maple syrup odour related to the accumulation of BCAA breakdown products, largely 2-keto acid derivatives and their reduced 2-hydroxy acids including ILA. A decade ago, ILA was identified in Arabidopsis thaliana. Subsequent studies in other plant species indicated that ILA is a ubiquitously present compound. Since its identification in plants, several efforts have been made to understand the biological significance and metabolic pathway of ILA. ILA plays a positive role in plant signalling for defence responses against bacterial pathogens by increasing the abundance of salicylic acid aglycone through competitive inhibition of SA deactivation by glucosylation. Here, we review recent progress in the characterization of ILA biosynthesis and function in plants and discuss current knowledge gaps and future directions in ILA research.
AU  - Mekonnen, D.W.
AU  - Ghirardo, A.
AU  - Zhang, W.
AU  - Schäffner, A.
C1  - 73153
C2  - 56934
CY  - 111 River St, Hoboken 07030-5774, Nj Usa
SP  - 195-202
TI  - The branched-chain amino acid-related isoleucic acid: recent research advances.
JO  - Plant Biol.
VL  - 27
IS  - 2
PB  - Wiley
PY  - 2025
SN  - 1435-8603
ER  - 

TY  - JOUR
AU  - Müller, C.*
AU  - Fuchs, B.*
AU  - Schnitzler, J.-P.
AU  - Unsicker, S.B.*
AU  - Whitehead, S.R.*
C1  - 75136
C2  - 57770
SP  - 633-636
TI  - Ecology and evolution of plant chemodiversity.
JO  - Plant Biol.
VL  - 27
IS  - 5
PY  - 2025
SN  - 1435-8603
ER  - 

TY  - JOUR
AB  - This study explores the chemical diversity of plant metabolites in different organs of black poplar (Populus nigra), a tree species of considerable ecological and economic importance, to broaden our knowledge of organs other than leaves, especially with regard to herbivore-induced changes. Targeted and non-targeted metabolite analyses were used to investigate the defence responses of black poplar organs, including leaves, wood, bark, and roots, to aboveground feeding damage by caterpillars of the generalist herbivore Lymantria dispar. The research revealed that metabolic responses to herbivory are organ-specific, with a large increase in unique features upon insect damage. Herbivory led to more significant changes in central (primary) metabolites than the targeted specialized (secondary) metabolites measured. The study concludes that understanding the complexity of organ-specific metabolism in black poplar can be very useful for investigating plant-herbivore interactions in this tree species.
AU  - Yepes-Vivas, S.*
AU  - Popp, M.
AU  - Reichelt, M.*
AU  - Gershenzon, J.*
AU  - Schnitzler, J.-P.
AU  - Unsicker, S.B.*
C1  - 74812
C2  - 57607
TI  - Deciphering organ-specific chemical changes following insect herbivory in Populus nigra using comparative metabolomics.
JO  - Plant Biol.
PY  - 2025
SN  - 1435-8603
ER  - 

TY  - JOUR
AB  - Tanacetum vulgare L., tansy, is a perennial plant with highly variable terpenoid composition, with mono- and sesquiterpenoids being the most abundant. The high diversity of terpenoids plays an important role in mediating ecological interactions. However, the distribution of terpenoids in different tissues and inducibility of terpenoids in these tissues via biotic stress are poorly understood. We investigated changes in terpenoid profiles and concentrations in different organs following treatment of roots with pipecolic acid (Pip), a non-proteinogenic amino acid that triggers defence responses leading to induce systemic resistance (SAR) in plants. Tansy leaves and midribs contained mainly monoterpenoids, while coarse and fine roots contained mainly sesquiterpenoids. Rhizomes contained terpenoid profiles of both midribs and roots but also unique compounds. Treatment with Pip led to an increase in concentrations of mono- and sesquiterpenoids in all tissues except rhizomes. However, significantly more sesquiterpenoids was formed in root tissues in response to Pip treatment, compared to shoots. The metabolic atlas for terpenoids presented here shows that there is exceptionally strong differentiation of terpenoid patterns and terpenoid content in different tissues of tansy. This, together with differential inducibility by Pip, suggests that the chemical diversity of terpenoids may play an important role in tansy ecological interactions and defence against biotic stressors that feed on below- and aboveground organs.
AU  - Rahimova, H.
AU  - Heinen, R.*
AU  - Weber, B.
AU  - Weisser, W.W.*
AU  - Schnitzler, J.-P.
C1  - 71484
C2  - 56209
CY  - 111 River St, Hoboken 07030-5774, Nj Usa
TI  - Exogenous stimulation of Tanacetum vulgare roots with pipecolic acid leads to tissue-specific responses in terpenoid composition.
JO  - Plant Biol.
PB  - Wiley
PY  - 2024
SN  - 1435-8603
ER  - 

TY  - JOUR
AB  - Many belowground processes, such as soil respiration and soil-atmosphere VOC exchange are closely linked to soil microbiological processes. However, little is known about how changes in plant species cover, i.e. after plant invasion, alter these soil processes. In particular, the response of soil volatile organic compound emission (VOCs) to plant invasion is not well understood. We analyzed soil VOC emissions and soil respiration of a Mediterranean cork oak (Quercus suber) ecosystem, comparing soil VOC emissions from a non-invaded Q. suber woodland to one invaded by the shrub Cistus ladanifer. Soil VOC emissions were determined under controlled conditions using online proton-transfer time-of-flight mass-spectrometry. Net soil VOC emissions were measured exposing soils with and without litter to different temperature and soil moisture conditions. Soil VOC emissions were sensitive to C. ladanifer invasion. Highest net emission rates were determined for oxygenated VOCs (acetaldehyde, acetone, methanol, acetic acid) and high temperatures enhanced total VOC emissions. Invasion affected the relative contribution of various VOCs. Methanol and acetaldehyde were emitted exclusively from litter and were associated to the non-invaded sites. In contrast, acetone emissions increased in response to shrub presence. Interestingly, low soil moisture enhanced the effect of shrub invasion on VOC emissions. Our results indicate that shrub invasion substantially influences important belowground processes in cork oak ecosystems, in particular soil VOC emissions. High soil moisture is suggested to diminish the invasion effect by a moisture induced increase of microbial decomposition rates of soil VOCs.
AU  - Meischner, M.*
AU  - Haberstroh, S.*
AU  - Daber, L.E.*
AU  - Kreuzwieser, J.*
AU  - Caldeira, M.C.*
AU  - Schnitzler, J.-P.
AU  - Werner, C.*
C1  - 65466
C2  - 52692
SP  - 967-978
TI  - Soil VOC emissions of a Mediterranean woodland are sensitive to shrub invasion.
JO  - Plant Biol.
VL  - 24
IS  - 6
PY  - 2022
SN  - 1435-8603
ER  - 

TY  - JOUR
AB  - The present study aimed to elucidate the influence of drought and elevated temperature on relative abundance and functioning of the ectomycorrhizal fungus Cenococcum geophilum on three oak species differing in adaptation to a warm and dry climate. The experiment QUERCO comprised three Quercus species (Q. robur, Q. petraea, Q. pubescens) grown for 3 years under four treatments: elevated air temperature, drought, a combination of the two, and control. Fine root samples were analysed for relative abundance and potential extracellular enzyme activities of ectomycorrhizae of C. geophilum, a fungal species known to be drought resistant. The relative abundance of C. geophilum on the roots of the oak species was significantly increased by temperature, decreased by drought, but unchanged in the combined treatment compared to the control. Although the extent of treatment effects differed among oak species, no significant influence of tree species on relative abundance of C. geophilum was detected. Exoenzyme activities of C. geophilum on Q. robur and Q. petraea (but not Q. pubescens) significantly increased in the combined treatment, but for all oak species were reduced under drought and air warming alone compared to the control. There was a significant negative correlation between abundance of C. geophilum and its leucine aminopeptidase activity. As this enzyme is not frequent among ectomycorrhizal fungi, this emphasises the functional importance of C. geophilum in the ectomycorrhizal community. Our results indicate that increased temperature and drought will influence the relative abundance and enzyme activity of C. geophilum. However, both the Quercus species and C. geophilum tolerated warming and strong drought.
AU  - Herzog, C.*
AU  - Peter, M.*
AU  - Pritsch, K.
AU  - Günthardt-Goerg, M.S.*
AU  - Egli, S.*
C1  - 11043
C2  - 30475
SP  - 230-237
TI  - Drought and air warming affects abundance and exoenzyme profiles of Cenococcum geophilum associated with Quercus robur, Q. petraea and Q. pubescens.
JO  - Plant Biol.
VL  - 15
IS  - S1
PB  - Wiley-Blackwell
PY  - 2013
SN  - 1435-8603
ER  - 

TY  - JOUR
AB  - European deciduous oaks are closely related and are known for their strong emission of volatile isoprenoids. They are chemo-taxonomically diverse, but hybridise frequently. Four-year-old oak seedlings growing together in a model ecosystem facility under near-natural conditions were studied. The leaves were morphologically classified in the three oak species Quercus robur, Q. pubescens and Q. petraea (with four provenances each) and further investigated by a molecular-genetic approach. Q. robur was morphologically and genetically clearly different from Q. pubescens and Q. petraea, whereas Q. pubescens and Q. petraea individuals used in this study were morphologically and genetically more similar. There was a minor impact of among and within species variability on isoprene synthesis, isoprene emission and photosynthesis. Isoprene emission rates normalised to 25 °C leaf temperature ranged from 5.78 to 10.66 nmol m−2 s−1, whereas photosynthesis ranged from 12.8 to 17.6 μmol m−2 s−1. On cloudy days, among the provenances of each species, only net photosynthesis of the Q. robur provenance Hünenberg was reduced and isoprene synthase activity of the Q. pubescens provenance Promotogno increased. On sunny days, photosynthesis did not differ among the provenances. Over all provenances, gas exchange on cloudy days did not differ significantly from sunny days. In the combined data of cloudy and sunny days, no differences between the studied provenances and oak species were detected in isoprene emission and photosynthesis. Thus, isoprene emission and photosynthesis rates were remarkably stable among oak species and provenances. The results indicate that taxonomic differences in the studied oak species are not reflected in isoprene emission and photosynthesis, probably because of the high plasticity of gene expression resulting in high phenotypic flexibility.
AU  - Steinbrecher, R.*
AU  - Contran, N.*
AU  - Gugerli, F.*
AU  - Schnitzler, J.-P.
AU  - Zimmer, I.
AU  - Menard, T.*
AU  - Günthardt-Goerg, M.S.*
C1  - 11606
C2  - 30712
SP  - 148-156
TI  - Inter- and intra-specific variability in isoprene production and photosynthesis of Central European oak species.
JO  - Plant Biol.
VL  - 15
IS  - S1
PB  - Wiley-Blackwell
PY  - 2013
SN  - 1435-8603
ER  - 

TY  - JOUR
AB  - Histochemical screening of 30 Rosaceae genera representing all classic subfamilies demonstrated flavan-3-ols (catechins) as general secondary metabolites in roots of Rosaceae. Semi-quantitative LC-MS analyses confirmed the presence of catechin, epicatechi
AU  - Hoffmann, T.*
AU  - Friedlhuber, R.*
AU  - Steinhauser, C.
AU  - Tittel, I.*
AU  - Skowranek, K.*
AU  - Schwab, W.*
AU  - Fischer, T.C.*
C1  - 7978
C2  - 29961
SP  - 33-40
TI  - Histochemical screening, metabolite profiling and expression analysis reveal Rosaceae roots as the site of flavan-3-ol biosynthesis.
JO  - Plant Biol.
VL  - 14
IS  - 1
PB  - Wiley-Blackwell
PY  - 2012
SN  - 1435-8603
ER  - 

TY  - JOUR
AB  - Due to reduced evaporation and diffusion of water molecules containing heavier isotopes, leaf water possesses an elevated (18)O or (2)H steady-state content. This enrichment has been exploited in plant physiology and ecology to assess transpiration and leaf water relations. In contrast to these studies, in this work the (2)H content of the medium of hydroponically grown Arabidopsis thaliana was artificially raised, and the kinetics of (2)H increase in the aerial parts recorded during a short phase of 6-8 h, until a new equilibrium at a higher level was reached. A basic version of the enrichment models was modified to establish an equation that could be fitted to measured leaf (2)H content during uptake kinetics. The fitting parameters allowed estimation of the relative water flux q(leaf) into the Arabidopsis rosette. This approach is quasi-non-invasive, since plants are not manipulated during the uptake process, and therefore, offers a new tool for integrated analysis of plant water relations. The deuterium tracer method was employed to assess water relocation in Arabidopsis pip2;1 and pip2;2 aquaporin knockout plants. In both cases, q(leaf) was significantly reduced by about 20%. The organ and cellular expression patterns of both genes imply that changes in root hydraulic conductivity, as previously demonstrated for pip2;2 mutants, and leaf water uptake and distribution contributed in an integrated fashion to this reduced flux in intact plants.
AU  - Da Ines, O.
AU  - Graf, W.
AU  - Franck, K.I.
AU  - Albert, A.
AU  - Winkler, J.B.
AU  - Scherb, H.
AU  - Stichler, W.
AU  - Schäffner, A.
C1  - 4191
C2  - 27427
SP  - 129-139
TI  - Kinetic analyses of plant water relocation using deuterium as tracer - reduced water flux of Arabidopsis pip2 aquaporin knockout mutants.
JO  - Plant Biol.
VL  - 12
IS  - SUPPL. 1
PB  - Wiley-Blackwell Publishing
PY  - 2010
SN  - 1435-8603
ER  - 

TY  - JOUR
AB  - Motor vehicles are now equipped with exhaust gas catalytic converters containing rare metals, such as palladium (Pd), platinum and rhodium, as catalytic active materials, leading to significantly increased emission of these metals. Compared with platinum and rhodium, low concentrations of Pd have been shown to have more serious effects on cells and organisms. In the present study, uptake of Pd by barley and behaviour of Pd nanoparticles in nutrient solutions used to grow plants were observed in order to develop a model of Pd exposure of plant systems. Pd determination was performed using a selective separation and pre-concentration procedure, which was further developed for this study, and coupled to graphite furnace atomic absorption spectrometry. The results show that uptake of Pd depends on Pd particle diameter. Compared to other toxic metals, like mercury, Pd causes stress effects in leaves at lower concentrations in nutrient solutions. Furthermore, Pd particles are dissolved at different rates, depending on size, in the nutrient solution during plant growth.
AU  - Battke, F.M.
AU  - Leopold, K.*
AU  - Maier, M.*
AU  - Schmidhalter, U.*
AU  - Schuster, M.*
C1  - 631
C2  - 25223
SP  - 272-276
TI  - Palladium exposure of barley: Uptake and effects.
JO  - Plant Biol.
VL  - 10
IS  - 2
PB  - Blackwell
PY  - 2008
SN  - 1435-8603
ER  - 

TY  - JOUR
AB  - The influence of free-air ozone (O3) fumigation on the levels of gene transcripts and compounds of defence and signalling were analysed in leaves of adult beech trees from the “Kranzberg Forest” research site in 2003 and 2004. This includes the precursor of the stress hormone ethylene, ACC (1-aminocyclopropane-1-carboxylic acid), conjugated salicylic acid, lignin content as well as of the expression level of genes connected with oxidative stress and stress signalling. At this site mature beech trees were exposed to an enhanced O3 regime by a free-air O3 canopy exposure system. Levels of conjugated ACC and conjugated salicylic acid in leaves were increased under O3 fumigation whereas lignin content was only slightly enhanced. Quantitative real-time RT-PCR (qRT-PCR) was performed on transcripts of genes connected with lignin, salicylic acid, and ethylene formation, the shikimate pathway, abscisic acid biosynthesis as well as with the antioxidative system. Genes which showed O3-dependent increases included FsCOMT (caffeic-acid O-methyltransferase) connected with lignin formation, the stress response genes FsACS2 (ACC synthase) and FsPR1 (PR10 - pathogenesis-related protein), as well as FsNCED1 (9-cis-epoxicarotenoid dioxygenase), the rate-limiting enzyme of the ABA synthesis. For FsNCED1 expression level, a significant O3 effect was found with an 8-fold (sun) and 7-fold (shade) induction in July 2003 and a 3-fold and 2.5-fold induction in July 2004. While the observed effects were not continuous, elevated O3 is concluded to have the potential to disrupt the defence and signalling system.
AU  - Jehnes, S.*
AU  - Betz, G.
AU  - Bahnweg, G.
AU  - Haberer, K.*
AU  - Sandermann, H.
AU  - Rennenberg, H.*
C1  - 3572
C2  - 24367
CY  - Stuttgart
SP  - 253-264
TI  - Tree internal signalling and defence reactions under ozone exposure in sun and shade leaves of European beech (Fagus sylvatica L.) trees.
JO  - Plant Biol.
VL  - 9
PB  - Thieme
PY  - 2007
SN  - 1435-8603
ER  - 

TY  - JOUR
AB  - Databases are needed for the ozone (O3) risk assessment on adult forest trees under stand conditions, as mostly juvenile trees have been studied in chamber experiments. A synopsis is presented here from an integrated case study which was conducted on adult Fagus sylvatica trees at a Central-European forest site. Employed was a novel free-air canopy O3 fumigation methodology which ensured a whole-plant assessment of O3 sensitivity of the about 30 m tall and 60 years old trees, comparing responses to an experimental 2 × ambient O3 regime (2 × O3, max. 150 nl O3 l-1) with those to the unchanged 1 × ambient O3 regime (1 × O3 = control) prevailing at the site. Additional experimentation on individual branches and juvenile beech trees exposed within the forest canopy allowed for evaluating the representativeness of young-tree and branch-bag approaches relative to the O3 sensitivity of the adult trees. The 2 × O3 regime did not substantially weaken the carbon sink strength of the adult beech trees, given the absence of a statistically significant decline in annual stem growth; a 3 % reduction across five years was demonstrated, however, through modelling upon parameterization with the elaborated database. 2 × O3 did induce a number of statistically significant tree responses at the cell and leaf level, although the O3 responsiveness varied between years. Shade leaves displayed an O3 sensitivity similar to that of sun leaves, while indirect belowground O3 effects, apparently mediated through hormonal relationships, were reflected by stimulated fine-root and ectomycorrhizal development. Juvenile trees were not reliable surrogates of adult ones in view of O3 risk assessment. Branch sections enclosed in (climatized) cuvettes, however, turned out to represent the O3 sensitivity of entire tree crowns. Drought-induced stomatal closure decoupled O3 intake from O3 exposure, as in addition, also the “physiologically effective O3 dose” was subject to change. No evidence emerged for a need to lower the “Critical Level for Ozone” in risk assessment of forest trees, although sensitive tree parameters did not necessarily reflect a linear relationship to O3 stress. Exposure-based concepts tended to overestimate O3 risk under drought, which is in support of current efforts to establish flux-related concepts of O3 intake in risk assessment.
AU  - Matyssek, R.*
AU  - Bahnweg, G.
AU  - Ceulemans, R.*
AU  - Fabian, P.*
AU  - Grill, D.*
AU  - Hanke, D.E.*
AU  - Kraigher, H.*
AU  - Osswald, W.*
AU  - Rennenberg, H.*
AU  - Sandermann, H.
AU  - Tausz, M.*
AU  - Wieser, G.*
C1  - 3573
C2  - 24368
CY  - Stuttgart
SP  - 163-180
TI  - Synopsis of the CASIROZ case study: Carbon sink strength of Fagus sylvatica L. in a changing environment - experimental risk assessment of mitigation by chronic ozone impact.
JO  - Plant Biol.
VL  - 9
IS  - 2
PB  - Thieme
PY  - 2007
SN  - 1435-8603
ER  - 

TY  - JOUR
AU  - Gayler, S.
AU  - Grams, T.E.E.*
AU  - Kozovits, A.R.*
AU  - Winkler, J.B.
AU  - Luedemann, G.*
AU  - Priesack, E.
C1  - 5005
C2  - 23720
SP  - 503-514
TI  - Analysis of competition effects in mono- and mixed cultures of Juvenile Beech and Spruce by means of the plant growth simulation model PLATHO.
JO  - Plant Biol.
VL  - 8
PY  - 2006
SN  - 1435-8603
ER  - 

TY  - JOUR
AU  - Mittelstraß, K.*
AU  - Treutter, D.*
AU  - Pleßl, M.*
AU  - Heller, W.
AU  - Elstner, E.F.*
AU  - Heiser, I.*
C1  - 1278
C2  - 23739
SP  - 653-661
TI  - Modification of primary and secondary metabolism of potato plants by nitrogen application differentially affects resistance to Phytophthora infestans and Alternaria solani.
JO  - Plant Biol.
VL  - 8
PY  - 2006
SN  - 1435-8603
ER  - 

TY  - JOUR
AB  - Ozone and light effects on endophytic colonization by Apiognomonia errabunda of adult beech trees (Fagus sylvatica) and their putative mediation by internal defence compounds were studied at the Kranzberg Forest free-air ozone fumigation site. A. errabunda colonization was quantified by "real-time PCR" (QPCR). A. errabunda-specific primers allowed detection without interference by DNA from European beech and several species of common genera of plant pathogenic fungi, such as Mycosphaerella, Alternaria, Botrytis, and Fusarium. Colonization levels of sun and shade leaves of European beech trees exposed either to ambient or twice ambient ozone regimes were determined. Colonization was significantly higher in shade compared to sun leaves. Ozone exhibited a marginally inhibitory effect on fungal colonization only in young leaves in 2002. The hot and dry summer of 2003 reduced fungal colonization dramatically, being more pronounced than ozone treatment or sun exposure. Levels of soluble and cell wall-bound phenolic compounds were approximately twice as high in sun than in shade leaves. Acylated flavonol 3- O-glycosides with putatively high UV-B shielding effect were very low in shade canopy leaves. Ozone had only a minor influence on secondary metabolites in sun leaves. It slightly increased kaempferol 3- O-glucoside levels exclusively in shade leaves. The frequently prominent hydroxycinnamic acid derivative, chlorogenic acid, was tested for its growth inhibiting activity against Apiognomonia and showed an IC50 of approximately 8 mM. Appearance of Apiognomonia-related necroses strongly correlated with the occurrence of the stress metabolite, 3,3',4,4'-tetramethoxybiphenyl. Infection success of Apiognomonia was highly dependent on light exposure, presumably affected by the endogenous levels of constitutive phenolic compounds. Ozone exerted only minor modulating effects, whereas climatic factors, such as pronounced heat periods and drought, were dramatically overriding.
AU  - Bahnweg, G.
AU  - Heller, W.
AU  - Stich, S.
AU  - Knappe, C.
AU  - Betz, G.
AU  - Heerdt, C.*
AU  - Kehr, R.D.*
AU  - Ernst, D.
AU  - Langebartels, C.
AU  - Nunn, A.J.*
AU  - Rothenburger, J.
AU  - Schubert, R.*
AU  - Wallis, P.
AU  - Müller-Starck, G.*
AU  - Werner, H.*
AU  - Matyssek, R.*
AU  - Sandermann, H.
C1  - 11012
C2  - 23773
SP  - 659-669
TI  - Beech leaf colonization by the endophyte Apiognomonia errabunda dramatically depends on light exposure and climatic conditions.
JO  - Plant Biol.
VL  - 7
IS  - 6
PB  - Wiley
PY  - 2005
SN  - 1435-8603
ER  - 

TY  - JOUR
AU  - Lötscher, M.*
AU  - Gayler, S.
C1  - 4816
C2  - 23253
SP  - 601-610
TI  - Contribution of current photosynthates to root respiration of non-nodulated Medicago sativa: Effects of light and nitrogen supply.
JO  - Plant Biol.
VL  - 7
PY  - 2005
SN  - 1435-8603
ER  - 

TY  - JOUR
AU  - Matyssek, R.*
AU  - Agerer, R.*
AU  - Oßwald, W.*
AU  - Pretzsch, H.*
AU  - Priesack, E.
AU  - Schnyder, H.*
AU  - Treutter, D.*
C1  - 4591
C2  - 23224
SP  - 560-580
TI  - The Plant's Capacity in Regulating Resource Demand.
JO  - Plant Biol.
VL  - 7
PY  - 2005
SN  - 1435-8603
ER  - 

TY  - JOUR
AU  - Matyssek, R.*
AU  - Schnyder, H.*
AU  - Munch, J.-C.
AU  - Oßwald, W.*
AU  - Pretzsch, H.*
AU  - Treutter, D.*
C1  - 4817
C2  - 23385
SP  - 557-559
TI  - Resource allocation in plants - the balance between resource sequestration and retention.
JO  - Plant Biol.
VL  - 7
PY  - 2005
SN  - 1435-8603
ER  - 

TY  - JOUR
AU  - Olbrich, M.
AU  - Betz, G.
AU  - Gerstner, E.
AU  - Langebartels, C.
AU  - Sandermann, H.
AU  - Ernst, D.
C1  - 5534
C2  - 23384
SP  - 670-676
TI  - Transcriptome analysis of ozone-responsive genes in leaves of European Beech (Fagus sylvatica L.).
JO  - Plant Biol.
VL  - 7
PY  - 2005
SN  - 1435-8603
ER  - 

TY  - JOUR
AB  - Spring barley ( Hordeum vulgare L. cv. Scarlett) was grown at two CO2 levels (400 vs. 700 ppm) combined with two ozone regimes (ambient vs. double ambient) in climate chambers for four weeks, beginning at seedling emergence. Elevated CO2 concentration significantly increased aboveground biomass, root biomass, and tiller number, whereas double ambient ozone significantly decreased these parameters. These ozone-induced reductions in growth parameters were strongly overridden by 700 ppm CO2. The elevated CO2 level increased C : N ratio of the leaf tissue and leaf starch content but decreased leaf protein levels. Exposure to double ambient ozone did not affect protein content and C : N ratio but dramatically increased leaf starch levels at 700 ppm CO2. Resistance against Drechslera teres (Sacc.) Shoemaker was increased in leaves grown at double ambient ozone but was less obvious at 700 ppm than at 400 ppm CO2. Constitutive activities of beta-1,3-glucanase and chitinase were significantly higher in leaves grown at double ambient ozone compared to ambient ozone levels. The sum of methanol-soluble and alkali-released cell wall-bound aromatic metabolites (i.e., C-glycosylflavones and several structurally unidentified metabolites) and lignin contents did not show any treatment-dependent differences.
AU  - Plessl, M.*
AU  - Heller, W.
AU  - Payer, H.-D.
AU  - Elstner, E.F.*
AU  - Habermeyer, J.*
AU  - Heiser, I.*
C1  - 4241
C2  - 0
SP  - 694-705
TI  - Growth Parameters and Resistance against Drechslera teres of Spring barley (Hordeum vulgare L.cv.Scarlett) Grown at elevated Ozone and Carbon Dioxide Concentrations.
JO  - Plant Biol.
VL  - 7
IS  - 6
PY  - 2005
SN  - 1435-8603
ER  - 

TY  - JOUR
AU  - Pritsch, K.*
AU  - Luedemann, G.*
AU  - Matyssek, R.*
AU  - Hartmann, A.
AU  - Schloter, M.
AU  - Scherb, H.
AU  - Grams, T.E.E.*
C1  - 3979
C2  - 23256
SP  - 718-727
TI  - Mycorrhizosphere responsiveness to atmospheric ozone and inoculation with Phytophthora citricola in a phytotron experiment with Spruce/Beech mixed cultures.
JO  - Plant Biol.
VL  - 7
PY  - 2005
SN  - 1435-8603
ER  - 

TY  - JOUR
AU  - Schloter, M.
AU  - Winkler, J.B.
AU  - Aneja, M.K.
AU  - Koch, N.*
AU  - Fleischmann, F.*
AU  - Pritsch, K.*
AU  - Heller, W.
AU  - Stich, S.
AU  - Grams, T.E.E.*
AU  - Göttlein, A.*
AU  - Matyssek, R.*
C1  - 3980
C2  - 23257
SP  - 728-736
TI  - Short term effects of ozone on the plant-rhizosphere-bulk soil system of young beech trees.
JO  - Plant Biol.
VL  - 7
PY  - 2005
SN  - 1435-8603
ER  - 

TY  - JOUR
AB  - Computerized tomography as a non-destructive scanning method to analyze wood structures has become an important technique in tree research. The possibility to reconstruct three-dimensional volumes based on a number of slices of two-dimensional data from CT scans is strongly dependent on the number of measured slices. Radial basis function methods can be successfully used to interpolate CT images with the aim of obtaining a satisfactory reconstruction of tree trunks. In contrast to standard interpolation techniques, our method takes into account that wood structures differ more in the radial than in the longitudinal direction. Therefore we obtain better interpolation results for wood structures. © Georg Thieme Verlag KG.
AU  - zu Castell, W.
AU  - Schrödl, S.J.
AU  - Seifert, T.*
C1  - 4475
C2  - 23314
SP  - 737-744
TI  - Volume interopolation of CT images from tree trunks.
JO  - Plant Biol.
VL  - 7
IS  - 6
PY  - 2005
SN  - 1435-8603
ER  - 

TY  - JOUR
AU  - Freitag, H.*
AU  - Stichler, W.
C1  - 22041
C2  - 20652
SP  - 121-132
TI  - Bienertia cycloptera Bunge ex Boiss., Chenopodiaceae, another C4 Plant without Kranz Tissues1.
JO  - Plant Biol.
VL  - 4
PY  - 2002
SN  - 1435-8603
ER  - 

TY  - JOUR
AU  - Grams, Th. E.E.
AU  - Kozovits, A.R.*
AU  - Reiter, I.M.*
AU  - Winkler, J.B.
AU  - Sommerkorn, M.
AU  - Blaschke, H.*
AU  - Häberle, K.-H.*
AU  - Matyssek, R.*
C1  - 22109
C2  - 20785
SP  - 153-158
TI  - Quantifying competitiveness in woody plants.
JO  - Plant Biol.
VL  - 4
PY  - 2002
SN  - 1435-8603
ER  - 

TY  - JOUR
AB  - A hypothesis on regulation of the balance between growth and parasite defence in plants is formulated, namely that plants regulate their resource allocation in a way where stress tolerance and resistance inherently lead to constraints on growth and competitiveness. Seven reviews and the subsequent article in this issue of Plant Biology contributing to this problem are briefly introduced in context.
AU  - Matyssek, R.*
AU  - Schnyder, H.*
AU  - Elstner, E.-F.*
AU  - Munch, J.-C.
AU  - Pretsch, H.*
AU  - Sandermann, H.
C1  - 9942
C2  - 20272
SP  - 133-136
TI  - Growth and parasite defence in plants; the balance between resource sequestration and retention : In lieu of a guest editorial.
JO  - Plant Biol.
VL  - 4
PB  - Blackwell
PY  - 2002
SN  - 1435-8603
ER  - 

TY  - JOUR
AB  - Clusia multiflora H.B.K., an obligate C-3 species and Clusia minor L. a C-3/CAM intermediate species, are two physio-types of a similar morphotype. They can sympatrically occupy secondary savanna sites exposed to high insolation in the tropics. In C. multiflora severe stress, i.e., switching shade-grown plants to high light plus drought, resulted in leaves browning or yellowing and becoming necrotic. However, in long-term light stress C. multiflora was able to grow new leaves with their photosynthetic apparatus fit for high light conditions. Shade-grown C. minor readily overcame switching to high light conditions and drought, responding by a rapid change from C-3 photosynthesis to CAM. Decreasing psi(soil) led to increased abscisic acid levels in the leaves of C. minor, however CAM induction was not directly related to this and was mainly determined by increased PPFD. Both species were capable of rapid accumulation of zeaxanthin for acute photoprotection following high PPFD exposure. The maximum capacity for zeaxanthin accumulation was larger in C. minor, but under steady high PPFD it only partially made use of this capacity, relying on high internal CO2 concentrations of Phase III of CAM, in addition to zeaxanthin, for acute photoprotection. Thus, by different means the two species perform well under high light conditions. However, C. multiflora needs time for development of adapted leaves under such stress conditions while the more flexible C. minor can readily switch from low light to high light conditions.
AU  - Herzog, B.*
AU  - Hoffmann, S.
AU  - Hartung, W.*
AU  - Lüttge, U.*
C1  - 23436
C2  - 31145
SP  - 460-470
TI  - Comparison of photosynthetic responses of the sympatric tropical C3 species Clusia multiflora H. B. K. and the C3-CAM intermediate species Clusia minor L. to irradiance and drought stress in a phytotron.
JO  - Plant Biol.
VL  - 1
IS  - 4
PB  - Wiley
PY  - 1999
SN  - 1435-8603
ER  -